House File 272, introduced in the Iowa House of Representatives on February 17, 2015, and referred to the House Committee on Education, would, if enacted, prevent Iowa from adopting the Next Generation Science Standards — and part of the stated reason is the NGSS's treatment of evolution and climate change.

Oklahoma's Senate Bill 665 (PDF), which would, if enacted, have deprived administrators of the ability to prevent teachers from miseducating students about "scientific controversies," died in the Senate Education Committee on February 26, 2015, when a deadline for senate bills to pass committee expired.